Saw-setting apparatus.



V. BOYLE.-

SAW SETTING APPARATUS.

APPLICATION FILED SEPT-25. 1914.

Patented Jan; 23-, 1917.

flW lWilnagwea m VERNON BOYLE, OF PATERSON, NEW JERSEY.

SAW-SETTING APPARATUS.

Specification of Letters Patent.

PatentedJ an. 23, 1917.

Application filed September 25, 1914. Serial N 0. 863,494.

To all whom z'tmay concern:

Be it known that I, VERNON BOY E, a citizen of the United States, andresident of Paterson, in the county of Passaic and State of New Jersey,have invented a new and useful Improvement in Saw-Setting Apparatus, ofwhich the following is a specification.

My invention relates to saw setting apparatus with the object in view ofproviding simple and effective means for setting saw teeth withoutdeforming the teeth.

A practical embodiment of the invention is represented in theaccompanying draw ings in which,

Figure 1 is a top plan view of the apparatus, showing a portion of acircular saw in the position which the saw assumes when its teeth arebeing set. Fig. 2 is a view of the same in side elevation partly insection. Fig. 3 is a vertical central section from front to rear. Fig. 4is a view in front elevation with saw removed. Fig. 5 is a horizontalsection in the plane of the line AA of Fig. 2. Fig. 6 is an enlargedview in detail in horizontal section, showing the position of thesetting tool with respect to a tooth for setting alternate teeth of thesaw in the same direction. Fig. 7 is a similar view, showing theposition of the saw setting tool for setting alternate teeth of the sawin the opposite direction. Fig. 8 is an enlarged view in detail invertical section, showing the position of the saw setting tool, theanvil and the saw tooth before the tool comes in contact with the tooth.Fig. 9 is a similar view, showing the position of the parts after thesaw setting tool has come into engagement with the tooth. Fig. 10 is aview corresponding to Fig. 8, showing the saw setting tool modified byhaving a fiat operating end as distinguished from a convex end, and Fig.11 is a view corresponding to Fig. 9, with the modified form of sawsetting tool above noted.

The frame of the apparatus consists of a casting 1, provided withflanges 2 and 3 at its base, through which bolts may conveniently passfor securing the frame to a bench or other support. The casting 1 isformed with a lower jaw 4; in which the anvil 5 is supported, and withan over-hanging jaw 6 in which the saw setting tool 7 is supported. Theanvil 5, as clearly shown in Fig. 3, is

conveniently provided with a stem 8 which enters a perforation .9, theanvil 5 resting on the surface of the jaw immediately surrounding theperforation 9.

The saw setting tool 7 has its upper portion 10 enlarged to fit with aneasy sliding movement the enlarged bore 11 in the upper aw 6 of theframe, the lower portion of the .tool 7 extending down through a smallerperforation 12 in the jaw 6, into position over the anvil 5. The tool 7is held normally in a retracted or raised position by means of a coilspring 13 seated between the bottom of the enlarged bore 11 and thelonger end of the enlarged portion 10 of the too The operating end ofthe tool 7 is flattened or cut away for a distance back from itsoperating face, as shown at 14, for causing it to clear a saw toothadjacent to the tooth being operated upon. The enlarged upper end of thetool 7 is further provided with a guide 15, projecting from its wall,Which guide slides up and down in one or the other of the two grooves16, 17, formed in the inner surface of the overhanging jaw 6. Thesegrooves 16, 17, are placed at such a distance apart as to accuratelylocate the tool in position for setting the alternate teeth of the saweither to the right or left as the case may be.

The lower end of the tool 7 may be either slightly convex, as shown inthe enlarged detail Figs. 8 and 9, the preferred form, or it may beflat, as shown in Figs. 10 and 11, the modified form.

The anvil 5 has in its top a concave depression 18, and surrounding thisconcave depression is a wall having a slight upward inclination, therebyforming a pronounced blunt edge 19, over which the tooth of the saw isbent.

For holding a circular saw in position tohave its teeth set, there isprovided a bracket in which the screw-threaded stem 22 of a conicalsupport 23 is held, the walls of the socket 21 being conveniently drawntogether by a screw 24 to lock the support 23 at the desired elevation.The bracket 20 is supported by means of rods 25, 26, which have ahorizontally sliding movement in suitable perforations in the frame 1,and are conveniently locked in their sliding adjustment out and in bymeans of a set screw 27. The conical shaped support 23 provides for sawshavin different sized central holes and the sliding of the bracket 20toward and away from the frame 1, provides for locking saws of differentdiameters with their teeth in position to be operated upon.

In operation, a saw, denoted by 28, having been placed in position onthe support 23 and the support adjusted to bring the saw blade into theproper position on the anvil with the tooth projecting over the bluntedge 19 of the anvil, the setting tool is struck by the operator,bringing it into contact with the saw tooth and bending the latter downinto the concave portion 18 of the anvil, giving it the set desired.WVhen every other tooth has been set, the saw may be reversed on itssupport, the saw setting tool swinging into the position shown in Fig.7, and each alternate tooth not previously set may be set in theopposite direc tion.

The concavity in the top of the anvil provides for the bending of thesaw tooth without deforming it by thinning it at the outer edge, anobjection heretofore common since the degree of concavity of the face ofthe anvil is, as shown, greater than the degree of convexity ofthe lowerend of the setting tool, and the blunt edge 19 of the anvil with theaccurate location of the saw on its support cooperates to form the bendin each vtooth at the same distance from the point of the tooth. I

The apparatus as a whole is simple and position to be set, of a sawsetting tool provided with a convex lower end and an anvil having aconcave face, the concavity of the anvil face being greater than theconvexity of the lower end of the setting tool.

3. In saw setting apparatus, an anvil, a saw setting tool, a sawcentering device, a main supporting element and a bracket in which thesaw'centering device has a vertical adjustment, the said bracket havinga support constructed to slide horizontally in the main supportingelement.

In testimony, that I claimthe foregoing as my invention I have signed myname in presence of two witnesses, this nineteenth day of September,1914.

VERNON BOYLE. Witnesses:

F. J. BRADLEY,

B. MURPHY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. G.

